OSPF Between Brands | How Routers Work | CNNA & Network+ Concepts

In this video I discuss how routers can automatically learn about what networks their neighbors are connected to using OSPF. For our lab, we'll build a multi-router set up environment and we happily mix brands together. I then discuss traceroute, some examples of how convergence works, and we wrap this with a brief summary and some thoughts about a business environment and how it would differ from a lab example.
Terms I utilize in this video:
Adjacency - this is when two routers have successfully traded routing information with OSPF
Convergence - this is the process of getting all the routers in your area onto the same page regarding the full routing table. When there's a network change, the convergence process will work around outages and path interruptions.
Mesh - when I use this term, I am describing how all devices are plugged into all other devices, creating a sort of web of ethernet connections.
Intranet - I am using this here as a way to describe the inter-networking of private subnets (192.168.x.x). Our organization can route our own self-defined subnets between departments and since it is internal to us, vs shared with the Internet at large, I call it an Intranet here. It may have other connotations in other settings.
/30 - this is a small network consisting of 4 IPs. We use this network to carve up the usual 253 IP address space of a /24 into 64 chunks, which let's us make full use of available IPs.
Let me know in the comments if I missed anything obvious!